Corrosion-resistant polyethylene combined pipe body structure

Abstract

The utility model provides a corrosion-resistant type polyethylene combined pipe body structure which comprises an outer-layer steel pipe, an inner-layer polyethylene pipe fitting, a first pipe body, a second pipe body and a limiting transverse strip, the inner-layer polyethylene pipe fitting is installed in the outer-layer steel pipe and composed of the first pipe body and the second pipe body, and the limiting transverse strip is installed in the first pipe body and composed of the first pipe body and the second pipe body. The first pipe body is connected to one end of the second pipe body; an existing polyethylene pipe body is improved, a combined pipe body structure is arranged, a traditional steel pipe forms the outer layer pipe body, the polyethylene pipe forms the inner layer pipe body, in this way, the steel pipe can guarantee the supporting strength of the combined pipe body, and the polyethylene pipe, making contact with liquid, on the inner side is high in corrosion resistance; and when the inner-layer polyethylene pipe fitting is mounted, the limiting transverse strips on the outer wall surface of the inner-layer polyethylene pipe fitting can be clamped in the limiting grooves, so that the inner-layer polyethylene pipe fitting is limited, and the stability is good after the inner-layer polyethylene pipe fitting is mounted.

Description

Technical Field

[0001] The utility model belongs to the technical field of polyethylene pipe bodies and relates to a corrosion-resistant polyethylene combined pipe body structure. Background Art

[0002] Pipelines are used to transport various liquids, including water, waste liquid or chemical liquid, etc. Liquids can be hot or cold, and hot liquids need to be cooled after discharge, while cold liquids are discharged normally through pipelines. For corrosive liquids with strong acidity and alkali, corresponding pipelines are also required for discharge. The existing alloy steel pipe structure has high external strength and good pressure resistance, but the internal corrosion resistance of the pipe body is poor. The pure polyethylene resin pipe has strong corrosion resistance, but the strength of the overall pipeline is poor. Therefore, a combined pipeline is designed to ensure both corrosion resistance and support strength. Summary of the invention

[0003] The utility model aims to provide a corrosion-resistant polyethylene composite pipe structure to solve the problems raised in the above-mentioned background technology.

[0004] The corrosion-resistant polyethylene composite pipe body structure includes an outer steel pipe, an inner polyethylene pipe fitting, a first pipe body, a second pipe body and a limiting cross bar. The inner polyethylene pipe fitting is installed inside the outer steel pipe. The inner polyethylene pipe fitting is composed of a first pipe body and a second pipe body. The first pipe body is connected to one end of the second pipe body. The inner polyethylene pipe fitting of the present application is a polytetrafluoroethylene pipe. Polytetrafluoroethylene has excellent chemical stability, can withstand all strong acids, strong alkalis, strong oxidants, and does not react with various organic solvents.

[0005] In the above-mentioned corrosion-resistant polyethylene composite pipe body structure, both ends of the outer steel pipe are fixedly connected with flanges, and the side positions of the flanges are provided with a plurality of threaded holes.

[0006] In the above-mentioned corrosion-resistant polyethylene composite pipe body structure, the inner wall surface of the outer steel pipe is provided with a plurality of limiting grooves, and the outer wall of the first pipe body is provided with a plurality of limiting horizontal bars, which are placed inside the limiting grooves.

[0007] In the above-mentioned corrosion-resistant polyethylene composite pipe body structure, one end of the first pipe body and one end of the second pipe body are both provided with limiting rings, and both ends of the outer steel pipe are provided with support ports, and the limiting rings are installed inside the support ports.

[0008] In the above-mentioned corrosion-resistant polyethylene composite pipe body structure, the center position of one end of the first pipe body is fixedly connected to an inner connecting ring through a support rod, and the center position of one end of the second pipe body is fixedly connected to a connecting screw through a support rod, and one end of the connecting screw is threadedly connected to the inside of the inner connecting ring.

[0009] In the above-mentioned corrosion-resistant polyethylene composite pipe body structure, two rubber sealing rings are arranged at the connection between the first pipe body and the second pipe body, and the two rubber sealing rings are respectively arranged at the installation ends of the first pipe body and the second pipe body.

[0010] Compared with the prior art, the advantage of the corrosion-resistant polyethylene composite pipe body structure of the utility model is that the present application improves the existing polyethylene pipe body and sets up a composite pipe body structure, in which the outer pipe body is composed of a traditional steel pipe, and the inner pipe body is composed of a polyethylene pipe. In this way, the steel pipe can ensure the supporting strength of the composite pipe body, and the polyethylene pipe in contact with the liquid on the inside has strong corrosion resistance, thereby ensuring the acid and alkali resistance of the composite pipe body. When the inner polyethylene pipe fitting is installed, the limiting horizontal bar on its outer wall can be stuck in the limiting groove, thereby limiting the inner polyethylene pipe fitting. After installation, the stability is also good. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model is a structural schematic diagram of the corrosion-resistant polyethylene composite pipe body structure.

[0012] Figure 2 The utility model is a schematic diagram of the structure of the outer steel pipe end of the corrosion-resistant polyethylene composite pipe structure.

[0013] Figure 3 The utility model is a schematic diagram of the structure of the inner polyethylene pipe fittings of the corrosion-resistant polyethylene composite pipe body structure.

[0014] Figure 4 The utility model is a schematic diagram of the installation structure of the inner polyethylene pipe fittings of the corrosion-resistant polyethylene composite pipe structure.

[0015] In the figure, 1. outer steel pipe; 2. inner polyethylene pipe fitting; 3. flange; 4. limit groove; 5. support port; 6. first pipe body; 7. second pipe body; 8. limit ring; 9. limit bar; 10. inner connecting ring; 11. connecting screw; 12. rubber sealing ring. DETAILED DESCRIPTION

[0016] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0017] The corrosion-resistant polyethylene composite pipe structure includes an outer steel pipe 1, an inner polyethylene pipe fitting 2, a first pipe body 6, a second pipe body 7 and a limiting horizontal bar 9. The inner polyethylene pipe fitting 2 is installed inside the outer steel pipe 1. The inner polyethylene pipe fitting 2 is composed of the first pipe body 6 and the second pipe body 7. The first pipe body 6 is connected to one end of the second pipe body 7. The inner polyethylene pipe fitting 2 of the present application is a polytetrafluoroethylene tube. Polytetrafluoroethylene has excellent chemical stability, can withstand all strong acids, strong alkalis, strong oxidants, and does not react with various organic solvents. PT FE has a wide operating temperature range and can be used for a long time in the temperature range of -180℃~250℃ under normal pressure. After being treated at a high temperature of 250℃ for 1000h, its mechanical properties change very little. PTFE has a very low friction coefficient and is a good anti-friction and self-lubricating material. Its static friction coefficient is smaller than the dynamic friction coefficient. Therefore, it has the advantages of small starting resistance and smooth operation when used to make bearings. Since PTFE is non-polar, heat-resistant and non-absorbent, it is also an excellent electrical insulating material with excellent aging resistance, non-stickiness and non-flammability.

[0018] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the corrosion-resistant polyethylene composite pipe body structure of the utility model, specifically, both ends of the outer steel pipe 1 are fixedly connected with flanges 3, and the side positions of the flanges 3 are provided with multiple threaded holes, and the flanges 3 are mainly provided to facilitate the fixation of the composite pipe fittings.

[0019] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the corrosion-resistant polyethylene composite pipe body structure of the utility model, specifically, the inner wall surface of the outer steel pipe 1 is provided with a plurality of limit grooves 4, the outer wall of the first pipe body 6 is provided with a plurality of limit horizontal bars 9, and the limit horizontal bars 9 are placed inside the limit grooves 4.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the utility model shows a corrosion-resistant polyethylene composite pipe body structure. Specifically, a limiting ring 8 is provided at one end of the first pipe body 6 and one end of the second pipe body 7. Support ports 5 are provided at both ends of the outer steel pipe 1. The limiting ring 8 is installed inside the supporting port 5. The supporting port 5 of the present application mainly supports the limiting ring 8, and the limiting ring 8 is provided to provide limiting support for the inner pipe body. When installing the first pipe body 6 and the second pipe body 7, a layer of glue can be first applied on the wall surface of the supporting port 5, and the limiting ring 8 can be bonded and fixed by the glue.

[0021] like Figure 1 , Figure 2 , Figure 3and Figure 4 As shown, the utility model shows a corrosion-resistant polyethylene composite pipe body structure. Specifically, an inner connecting ring 10 is fixedly connected to the center position of one end of the first pipe body 6 through a support rod, and a connecting screw 11 is fixedly connected to the center position of one end of the second pipe body 7 through a support rod, and one end of the connecting screw 11 is threadedly connected to the inside of the inner connecting ring 10, and the inner connecting ring 10 and the connecting screw 11 are both corrosion-resistant alloy metal structural parts.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the utility model has a corrosion-resistant polyethylene composite pipe body structure. Specifically, two rubber sealing rings 12 are provided at the connection between the first pipe body 6 and the second pipe body 7, and the two rubber sealing rings 12 are respectively provided at the installation ends of the first pipe body 6 and the second pipe body 7. The rubber sealing ring 12 is provided in the present application mainly to improve the sealing strength of the connection between the first pipe body 6 and the second pipe body 7.

[0023] The utility model corrosion-resistant polyethylene composite pipe structure, when installing, first install the first pipe body 6 inside the outer steel pipe 1, insert the first pipe body 6 into the steel pipe from one end of the outer steel pipe 1, and when installing, pay attention to align the limiting horizontal bar 9 with the limiting groove 4 and insert it, the limiting horizontal bar 9 can be stuck in the limiting groove 4, so as to limit the inner polyethylene pipe 2, after installation, the stability is also good, after the first pipe body 6 is installed, then insert the second pipe body 7 at the other end of the outer steel pipe 1, and rotate the first pipe body 6 so that the connecting screw at one end of the second pipe body 7 The rod 11 is threadedly sleeved on the inside of the inner connecting ring 10, so that one end of the first tube body 6 and one end of the second tube body 7 can be gradually squeezed together to form a complete inner polyethylene pipe fitting 2. At the same time, the installation of the entire combined pipe body is also completed. The combined pipe body of the present application is composed of a traditional steel pipe to form an outer pipe body, and a polyethylene pipe to form an inner pipe body. In this way, the steel pipe can ensure the external supporting strength of the combined pipe body, and the polyethylene pipe on the inside of the pipe body that is in contact with the liquid has strong corrosion resistance, thereby ensuring the acid and alkali resistance of the combined pipe body.

[0024] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The specific embodiments described in this article are only used to illustrate the spirit of the utility model. The technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar way, but they will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

Claims

1. A corrosion-resistant polyethylene composite pipe structure, comprising an outer steel pipe (1), an inner polyethylene pipe fitting (2), a first pipe body (6), a second pipe body (7) and a limiting horizontal bar (9), characterized in that: An inner polyethylene pipe fitting (2) is installed inside the outer steel pipe (1), and the inner polyethylene pipe fitting (2) is composed of a first pipe body (6) and a second pipe body (7), and the first pipe body (6) is connected to one end of the second pipe body (7).

2. The corrosion-resistant polyethylene composite pipe structure according to claim 1, characterized in that: Both ends of the outer steel pipe (1) are fixedly connected with flanges (3), and the sides of the flanges (3) are provided with a plurality of threaded holes.

3. The corrosion-resistant polyethylene composite pipe structure according to claim 1, characterized in that: The inner wall surface of the outer steel pipe (1) is provided with a plurality of limit grooves (4), and the outer wall of the first tube body (6) is provided with a plurality of limit horizontal bars (9), and the limit horizontal bars (9) are placed inside the limit grooves (4).

4. The corrosion-resistant polyethylene composite pipe structure according to claim 1, characterized in that: One end of the first tube body (6) and one end of the second tube body (7) are both provided with a limiting ring (8); both ends of the outer steel tube (1) are provided with a supporting port (5); and the limiting ring (8) is installed inside the supporting port (5).

5. The corrosion-resistant polyethylene composite pipe structure according to claim 1, characterized in that: The center position of one end of the first tube body (6) is fixedly connected to an inner connecting ring (10) via a support rod, and the center position of one end of the second tube body (7) is fixedly connected to a connecting screw (11) via a support rod, and one end of the connecting screw (11) is threadedly connected to the inside of the inner connecting ring (10).

6. The corrosion-resistant polyethylene composite pipe structure according to claim 1, characterized in that: Two rubber sealing rings (12) are arranged at the connection between the first tube body (6) and the second tube body (7), and the two rubber sealing rings (12) are arranged at the installation ends of the first tube body (6) and the second tube body (7), respectively.

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